21043024402 has 8 divisors (see below), whose sum is σ = 31574987136. Its totient is φ = 10518028692.

The previous prime is 21043024391. The next prime is 21043024447. The reversal of 21043024402 is 20442034012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734198 + ... + 1746289.

It is an arithmetic number, because the mean of its divisors is an integer number (3946873392).

Almost surely, 2^21043024402 is an apocalyptic number.

21043024402 is a deficient number, since it is larger than the sum of its proper divisors (10531962734).

21043024402 is a wasteful number, since it uses less digits than its factorization.

21043024402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483512.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21043024402 its reverse (20442034012), we get a palindrome (41485058414).

The spelling of 21043024402 in words is "twenty-one billion, forty-three million, twenty-four thousand, four hundred two".